1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6567186d4a2359c1781e074916c90a34b484b86ab3e944860818df829e17fac. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac12cf2b-5248-4a6e-a34f-38a04b3e8e92.json and https://artists.proofprofile.net/proofs/artist/ac12cf2b-5248-4a6e-a34f-38a04b3e8e92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051dde9d4db56acaa07d0c53c184a8530017923d1aae2549643477c171b1492f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30539c89839104e8da7a2cdbf602c353416a464ef0858608df706395e38bd218. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9362c7c7bef480e2ed7ede817832db2d5a4b3eb92519c230a07d60eaf3a1a518. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL9400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5201b4b677903ffeffc9683cd52ed3451e6f3f8430ed4003b80a798981ffad1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2cbdacb5116151f7a89013cc873537c33ea5f5f2904e0adb0e85eeb78ed9b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e88ae419f0bf878e69e77f23904880afdac14f061313a2c31cbeaaef67684b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbc3c35546f16daccd33da5d906d0f0425255dc61e57b8d0f05dbb87f4b5d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2866c5214a43ff64238c4427748eb482e9d0609325e4f5454b7b2a7b6bb68fa4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeaa4bbe77061effe32f9fbe47591ac5ceaee7bfdf598bcd78a640456295fd6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012f3e7d4be7a7c955a2cf44ec5d184a90cba2f710c2c0594c8a21ebad39060. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906f68b7c345217207dd1c6b0b827da387b6f3a99a97f075b4fc361ffadeca1e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804082bcff5fd8965294b5bee8bb63323d134465299a1a34367d146f879d3bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRSGL8100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7400525a3ab44740cb9d9a3a67284b87f61740fb81620a3708d126aca4c7e71. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKNKT2301678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d553fe8c20038a4f3e76fc3644a4d1321de68300c02a80732603d86d5d037a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKNKT2301679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f64149d459fd7a54bf9ad918873e411dec79841d286170b7bd07b3c5d50bd6d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75d3aebaaa2117b71228c6ae73d0df779c698fe0319e6abc724b8cfc174b8dc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c1b04dd83f19346f00598ee4ad5ff8b3e3913d9897cb582ed69b8cc6c4259d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e00504bfc8044e9604ec98a6f8e5080bd01e8aee137275b4b67915ef27481c1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a36a7fb103187881f5bd8de394f10b66cc30b28d80b3d0339c1da15b5eefa7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f64149d459fd7a54bf9ad918873e411dec79841d286170b7bd07b3c5d50bd6d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKMDY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8be97bca170a851259dd8a9a45c22177573a59ff15e856c4d6a1586caa0e93. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRGE8400361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46782e313dae956c8a42cc84ac02a6aa318ab567ed78f2c19b2bd47edb4eb0d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRRGE8300220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9575eaa984b46edfcfeea76b9e1c405a55cb33c07b93160fe98176798900259. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCLQ2100381.